Final answer:
Mary is guilty of attempting to bribe a police officer by offering a date in exchange for not receiving a speeding ticket, which is a criminal offense.
Step-by-step explanation:
Mary's offer of a date to Officer John in exchange for not receiving a speeding ticket constitutes a criminal offense known as bribery. Bribery is an act of giving money, goods, or other forms of recompense to a recipient in exchange for altering their behavior to the benefit of the giver, which is illegal and a form of corruption. In this case, Mary is guilty of attempting to bribe a police officer, which is a serious offense. The police officer, if caught agreeing to this, would also be guilty of accepting a bribe.